With the help of underwater marine divers, firefighters, Coast Guard personnel, and helicopters, police searched overnight Tuesday for Tadrzynski and Krewson. The search commenced again Wednesday morning and extended into the evening, but there was no sign of the teens.

The Neshaminy Creek is a popular swimming hole in Bensalem, but it can be dangerous, police said. The particular section of the creek where Tadrzynski, Krewson, and Lawrence had been swimming is reportedly marked with a "No Swimming" sign.

"It's a tragic situation," Bensalem Sgt. Andrew Aninsman told PhillyBurbs.com. "We know everybody wants to go swimming in summer and cool off, but this creek is not the place to do it. The waters are very strong and we've had downpours for a few days. Stay out of the Neshaminy Creek."

Krewson, who had enlisted in the Marine Corps, was scheduled to leave for basic training at Parris Island, N.C., Wednesday.

Tadrzynski was a third-degree black belt who had just graduated from Bucks County Technical High School.